Fix merges not working when project is not licensed for squash

Closes #3321

See merge request !2817

Fix unsetting credentials data for pull mirrors

Closes #3308

See merge request !2810

Add icon for billing

Closes #3297

See merge request !2814

[ci skip]

[ci skip]

Closes #3321

Extend early adopters feature set

Closes gitlab-com/support-forum#2398

See merge request !2816

Remove private token.

See merge request !2813

Docs: update repo mirroring

Closes #3030

See merge request !2808

Fixes bug where mirror trigger builds is nil at project create.

See merge request !2797

CE upstream: Wednesday

Closes gitlab-ce#37147, gitlab-ce#36804, gitlab-ce#36633, gitlab-ce#34323, and gitlab-ci-multi-runner#2696

See merge request !2787

Remove Geo system hooks

See merge request !2644

Add LDAP sync endpoint to Groups API

Closes #2304

See merge request !2785

EE port of enable-new-navigaton-by-default

See merge request !2795

Docs: port article to EE

See merge request !2799

Change wording about the ssh key of Geo nodes admin page

Closes #3290

See merge request !2794

Merge branch '31273-creating-an-project-within-an-internal-sub-group-gives-the-option-to-set-it-a-public-ee' into 'master'

Port of "Resolve various visibility level settings issues" to EE

See merge request !2793

Add missing import statements

Closes #3268

See merge request !2791

* upstream/master: (107 commits)
  Decrease ABC threshold to 55.25
  Adds a tooltip to the branch name
  Optimize system note service specs
  Decrease Metrics/PerceivedComplexity threshold to 17
  Upgrade mail and nokogiri gems due to security issues
  Link out to stackoverflow answer on setting swappiness
  Document swappiness recomendations in the requirements doc
  Migrate Repository.FetchRemote to Gitaly
  Fix invalid attribute used for time-ago-tooltip component
  Use the correct scope to avoid triggering all dropdowns
  fix :file_path - add requirements:
  Update latest artifacts doc
  Add changelog entry for flipping verify_certificates
  Default LDAP config verify_certificates to true
  Update share project with groups docs
  remove accidental console.log from karma tests
  update specs to match reorganized monitoring components
  Remove tooltips from new sidebar
  puts back `function` statements
  Removes disabled state from projects dropdown in dashboard page
  ...

Optimize system note service specs

See merge request !13958

Fix the /projects/:id/repository/files/:file_path/raw endpoint to handle dots in the file_path…

Closes #31470

See merge request !13512

Migrate Repository.FetchRemote to Gitaly

See merge request !13625

Decrease ABC threshold to 55.25

See merge request !13904

Removes disabled state from projects dropdown in dashboard page

Closes #37179

See merge request !13933